Ghosh Sankalpa, Sharma Manish
Department of Physics, Indian Institute of Technology, Delhi, New Delhi-110016, India.
J Phys Condens Matter. 2009 Jul 22;21(29):292204. doi: 10.1088/0953-8984/21/29/292204. Epub 2009 Jul 3.
An analysis of electron transport in graphene in the presence of various arrangements of delta-function like magnetic barriers is presented. The motion through one such barrier gives an unusual non-specular refraction leading to asymmetric transmission. The symmetry is restored by putting two such barriers in opposite directions side by side. Periodic arrangements of such barriers can be used as Bragg reflectors whose reflectivity has been calculated using a transfer matrix formalism. Such Bragg reflectors can be used to make resonant cavities. We also analyze the associated band structure for the case of infinite periodic structures.
本文对存在各种类δ函数磁垒排列情况下石墨烯中的电子输运进行了分析。穿过一个这样的势垒的运动会产生一种不寻常的非镜面折射，导致不对称传输。将两个这样的势垒并排放置在相反方向可恢复对称性。这种势垒的周期性排列可用作布拉格反射器，其反射率已使用转移矩阵形式进行了计算。这种布拉格反射器可用于制造谐振腔。我们还分析了无限周期结构情况下的相关能带结构。
